【单选题】
Great as Newton was, many of his ideas today ______ and are being modified by the work of scientists of our time.
A.are to challenge
B.may be challenged
C.have been challenged
D.are challenging
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根据网考网移动考试中心的统计,该试题:
33%的考友选择了A选项
3%的考友选择了B选项
56%的考友选择了C选项
8%的考友选择了D选项